SelectorNotFoundException after a few flow cycles


Hi Team,

I am using UiPath Studio Community ver 18.1.3.

We are running a native windows multimodal application in which we can open\close some windows, press buttons and so on…
I created a flowchart with some ‘click’, ‘double click’ and ‘element exists’ activities.
After a few actions that take about 1 minute, the cycle (flow) resumes.
The issue is that after a few cycles appears a workflow exception: “Exception Type: SelectorNotFoundException”.
I thought it is a problem with selectors but this is happening randomly: after a few cycles (the number of cycles differs) or for a different source (click on a button\element or another)